Method of manufacturing horseshoe calks



Jan. 19,1926. 1 1,570,455

T. F.- BOYLAN, SR

METHOD OF MANUFACTURING HORSESHOE CALKS Filed Jan. 21, 1925 ATTORNEYS Patented Jan. 19,1926 n THOMAS F. BOiYLAN, sn jor imunswroiz,fnnwiinnsniz; Ass'ren'on To SHARP, MANUFACTURING co ornnwvsannswrog nnw JERSEY, A coupons- Tron or nnw was;

' ,rtnrnon @mwracwm-"G nonsnsiioncnn zsl a i atioiimea awry To all whom it may concerni- I Jersey, have invented a new and Improved Be it knownthatgI, THOMAS F. 130mm,

Sr., a citizen of the United States. of

America, and resi'dent of New Brunswick, in the county of Middlesex andState of New Method "of Manufacturing Horseshoe Calks'; of which thefollowing is a full, clear, and exactdescription', g

This invention-has relation to a" method of manufacturinghorseshoecalks; particiila'rly of the blunt drivepattern, fromhigh carbon steel wire the'cold-proce'ssfi h One of the objects is, the invention resides in a methodgof manufacturing a blunt drive patterncalk-froni 'a high carbon steel'wire sectionby the coldproce'ss during which the wire is subjected-to impact and/pressure while-cold which causes the sameto' flow "in the presence of'tools and diesto-properly form and shape the same.

The invention as a' further object iconip're' hends a method of manufacturing blunt drive 'pattern calks by the cold process which;

method is eX'tremelyeconomical as compared with the drop forgepr0cess,and: further embodies the features of simplicity and efii- With the above recited and other objects in viewreferenceis made to the following claims, and ithe annexed drawings, inv which Figure 'lisa view 'llustratinga pieceof high carbon steel wire,- which has been cut ofi? to the proper length? Fig. 2 is a s1de,view illustrating the billet I after the-'samehasheen operated upon to effect the initial forming of the shank andv head. Fig. 3 is a similar View illustrating the next successive operation for further form-.. ing the head. g Fig. 4 is a side illustrating the final operation in finishing the head and the-shank to their proper size'and configuration. lfilfiig. 5 is an edge view of thecomplete ca Fig. 6 is a perspective .viewthereof. In practice the method consists in cutting the high carbon .steelwire while cold into the proper length to produce the section indicated at A in Fig. 1 which is of sub stantially cylindrical configuratiom The cutting of the lengths from the wire is pref- Ling approxi' j'atel to m -acconip1ished a dbu i stroke header'ii The section or billet A then car-f ried over and one end thereof isY'inserted-Q,

or entered intoa tapered diewheretheprof jectingend is struck'with"a punch tool to form the shank l B to approxi-"mately I its prop er} sizeaa-nd tap er, lsaid punch tool simuL taneonsly iforrning the projecting portionC which is constitutef'the head; into the f? shape'illustratedin 'Fig 2 which'defines' 'at" the juncture ofi'theportion- C with 'the V shank B a' bulge D while therernaim'ng free 'end is substantially frustro conicall The shape F having a rounded shoulder G "at projecting end is further subjected' to an im "pact zstroke whichchangesthe form'of the. headto vthat illustrated ,in'Fig. '3 further g upsetting the samewto the frustro conical the junctureorits inner end withi heshaiik and at thesame time producing a reduced annular downwardly projecting 'bo'ssI-I 'at its free 'outer' end. The shank B of the die to finish the same" to ,its roper size and flattened'opposite side faces' I on the head an arcuate or conveX-"lowenend. surface K;

The H3150 asstunes shape conform the headbut ofi ducedsize-.t i

cream messa ing "it-willjjthus-be'seen tapered-and atthe; sametime'to produce that the herein described method of manU-J facturing blunt drive pattern"horseshoe x c'alksby thecoldprocess consists essentially i l 7 in cutting oflfa lengthof high carbon steel wire while cold into the required lengths entering one end of each of said lengths into a tapered die, initially subjecting the projecting ends of'said lengths tothe impact of ously upsetting the remaining head portion projectingjfrom the die to produce an annu Ilarshoulder and bulge at the juncture of the headand shank, further'subjectinq said head iiirther upi.

portion to a second impact for Setting -h ad m effect the shaping9ftl e I portion, which faces. converge, outwardly leaving rounded endsurfaces for walls .J

a tool for forming a taperedshank atone I end of each section 'which is approximately the proper sizeand taperwhile simultane to produce oppositely outwardly converging faces, rounded opposite, end walls and an arcuate lower end face with a similarly formed reduced boss and at the same time finishing the shank to its proper size and taper.

I claim:

1, The herein described method of 'manufacturing blunt drive pattern horseshoe calks by the cold process con sisting in entering one end of an elongated cylindrical high carbon wire section into a tapered die, subjecting the same to an initial impact for forming a tapered shank atone end of the section and simultaneously upsetting the remaining head vdefiningportion projecting from the die to produce a bulge at the juncture of'the head and shank, subjecting said head portion to further impact whereby to further upset the head to effect shaping of the same into a substantially frustro conical form with a rounded shoulder at its juncture at the inner endof the shank and simultaneously producingat the outer end a reduced outwardly projecting circular boss and then' entering the shank into a die exerting a pressure on the head to simultaneously flatten the o -wsite sides of the head for producing opposite outwardly converging faces, rounded opposite end Walls, an arcuate end" face while similarly shaping the boss and atthe same time finishing the shank to its proper sizeand ta er.

2 T e herein described method of manu-- facturing blunt drive pattern horseshoe calks-by the cold process consisting. in entering one end of an elongated cylindrical high carbon steel wire section into a ;die, subjecting the same to an initial impact for forming a tapered shank at one end of the section to approximately its proper size and taper and simultaneously upsetting the remaining portion projecting from the die to produce an annular sh'oulderand bulge at the juncture of said portionwith the shank, subjecting said portion to a second impact for further upsetting the same to eiiect the shaping thereof into a substantially frustro conical form with a rounded shoulder at the juncture of its inner end with the shank and'simultaneously producing at the outer end a reduced outwardl'yprojecting annular boss, then entering the shank-into a second tapered .die and exerting a pressure on the projecting portion to shape a head provided with flattened opposite sides presenting outwardly converging faces, rounded opposite end walls and an *arcuate lower end face with a similarly formed boss and at the same time finishing the shank in said second die to its pr-oper size and tape-r.-

v 3. The herein described methodof 111111111 facturing blunt drive pattern calks by the cold process consisting'in feeding high car bon steel wire into a double stroke header, cutting off the same into the required lengths, carrying over and entering one'end of each said lengths into a tapered die, striking the portion projecting fromthe'd'ie with a punch tool to form the shank to approximately its proper size and" taper and simultaneously forming the projecting, portion with an annular bulge adjacent its j uncture with the shank, subjecting the-project'- ing portion to a second stroke to change the same to substantially a frustro conical shape with a rounded shoulder at the juncture with the shank, placing the shank in the tapered die of a toggle press, subjecting the projecting portion to'a pressure between the sliding, jaws for flattening the opposite 1 sides to provide outwardly converging v faces, rounded end walls and an arcuate bottom wall and simultaneously finishingthe shank to its proper size and taper.

THOMAS F. BOYLAN si. 

